Hans Bergsten wrote:
> Christopher Cobb wrote:
> >
> > > Actually, I tried opening the .html file and just sending the bytes back to the
> > > browser. This didn't work either because the 'environment' (current document
> > > directory, etc.) was not correct. It happens that the .html file I'm trying to
>open
> > > uses frames. It could not find the frame pages because the environment was still
> > > set to the servlet's environment rather than the .html file's environment.
> >
> > Hans Bergsten wrote:
> >
> > > You can probably solve that problem by adding a <BASE HREF> tag in the <HEAD>
> > > part of the HTML file, e.g.
> > >
> > > <HEAD>
> > > <BASE HREF=/base/path/for/frame/pages>
> > > </HEAD>
> >
> > Excellent suggestion! Unfortunately, even with the <BASE> tag as the first thing
> > in my <HTML> tag, I still get the following error message:
> >
> > "Netscape is unable to find the file or directory named /xyz/logo.html. Check the
> > name and try again."
> >
> > The funny thing is, /xyz/logo.html is exactly the right name. I still think there
> > is something funny in the environment that the servlet has defined vs the
>environment
> > that the web page needs.
>
> The browser only cares about URLs. It has no idea how the HTML pages was generated.
> So if the URL for the current page is /servlet/theServletThatGeneratedThePage
> and you have a relative URL in the page, e.g. logo.html, the browser will form
> an absolute URL based on the current URL, i.e. /servlet/logo.html in this example.
Yes, I'm following you so far.
> If you use a <BASE HREF> tag, the browser will use it instead of the current URL
> to resolve relative URLs.
OK. What I have in my 'toplevel.html' file is:
<HTML>
<HEAD>
<base href="/xyz/toplevel.html">
<TITLE>...</TITLE>
</HEAD>
<frameset ...>
<frame src="logo.html" ...>
...
</HTML>
This was a page authored by someone else. There is no <body> tag here, and I assume
this is correct with respect to using framesets.
If I type http://localhost/xyz/logo.html into the browser's location field, it has no
problem finding it.
And if I type http://localhost/xyz/toplevel.html, everything looks fine.
But if I type http://localhost/servlet/GuardServlet/xyz/toplevel.html, I get the
'unable to find /xyz/logo.html' message for each frame in the set.
> Finally, if you use absolute URLs there's no resolving needed so the browser
> goes out and asks for the URLs exactly the way they are defined in the page.
Well, absolute references don't work either. If I change my toplevel.html file to be:
...
<base href="/xyz/toplevel.html">
...
<frame src="/xyz/logo.html" ...>
...
(changing the frame reference to be absolute instead of relative) I still get the same
'unable to find /xyz/logo.html' error as before.
The only reference that works is a fully qualified URL:
...
<base href="/xyz/toplevel.html">
...
<frame src="http://localhost/xyz/logo.html" ...>
...
> So take a close look at you HTML file again. Is the <BASE HREF> in the <HEAD>
> part of the page, as opposed to the <BODY>? You mentioned frames. Did you add
> the <BASE HREF> to both the page with the FRAMESET and the pages shown in the
> frames?
Are you saying that I need to add a <BASE ...> tag to each frame file? But it's not
getting that far: it can't locate the frame file at all so the contents of the frame
file surely don't matter (yet).
> There must be some mistake of this nature. Again, if the HTML is correct
> the browser couldn't care less about how it was generated.
Since there is only two short html files involved here (one with 32 lines and another
with 13 lines), I would be happy to have anyone examine them more closely (they are
attached to this message). Again, I am not the author of these pages. I'm just
trying to get them to work with JSP.
BTW, thanks for your lengthy and patient reply.
Chris
Title: Electronic Commerce
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